1225013512 has 8 divisors (see below), whose sum is σ = 2296900350. Its totient is φ = 612506752.

The previous prime is 1225013497. The next prime is 1225013513. The reversal of 1225013512 is 2153105221.

It can be written as a sum of positive squares in only one way, i.e., 1118634916 + 106378596 = 33446^2 + 10314^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is not an unprimeable number, because it can be changed into a prime (1225013513) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 76563337 + ... + 76563352.

Almost surely, 2^1225013512 is an apocalyptic number.

It is an amenable number.

1225013512 is a deficient number, since it is larger than the sum of its proper divisors (1071886838).

1225013512 is a wasteful number, since it uses less digits than its factorization.

1225013512 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 153126695 (or 153126691 counting only the distinct ones).

The product of its (nonzero) digits is 600, while the sum is 22.

The square root of 1225013512 is about 35000.1930280391. The cubic root of 1225013512 is about 1069.9914146107.

Adding to 1225013512 its reverse (2153105221), we get a palindrome (3378118733).

The spelling of 1225013512 in words is "one billion, two hundred twenty-five million, thirteen thousand, five hundred twelve".